20 minutes to learn welding knowledge, understand these explanations useful!
Release time:
2022-07-23
【Summary Description】 Welding: Usually refers to the welding of metal. It is a forming method that makes two separated objects produce interatomic binding force and connect them into one by heating or pressurizing, or both at the same time. Classification: According to the different heating degree and process characteristics in the welding process, welding methods can be divided into three categories. (1) Fusion welding. The welding part of the workpiece is locally heated to a molten state to form a molten pool (usually with filler metal), which is cooled and crystallized to form a weld, which is combined into an inseparable whole by the welding workpiece. Common fusion welding methods include gas welding, arc welding, electroslag welding, plasma arc welding, electron beam welding, laser welding, etc. (2) Pressure welding. In the welding process, regardless of heating or not, all need pressure welding method. Common pressure welding are resistance welding, friction welding, cold pressure welding, diffusion welding, explosive welding, etc. (3) Brazing. After the brazing filler metal (filler metal) with a melting point lower than that of the metal to be welded is melted, the joint gap is filled, and the metal to be welded is interdiffused to realize the connection. The welding workpiece does not melt during the brazing process and generally has no plastic deformation. Characteristics of welding production: (1) Save metal materials and light structure. (2) To make heavy and complex machine parts, simplify casting, forging and cutting processes, and obtain the best technical and economic results. (3) The welded joint has good mechanical properties and sealing performance. (4) It is possible to manufacture a bimetal structure so that the performance of the material can be fully utilized. Application: Welding technology is widely used in machine manufacturing, shipbuilding industry, construction engineering, power equipment production, aviation and aerospace industry. Deficiencies: welding technology also has some shortcomings, such as welding structure can not be disassembled, to the maintenance of inconvenience; welding structure will exist in the welding stress and deformation; welding joints of the organization and properties are often uneven, and will produce welding defects.
Welding: Usually refers to the welding of metal. It is a forming method that makes two separated objects produce interatomic binding force and connect them into one by heating or pressurizing, or both at the same time.
Classification: According to the different heating degree and process characteristics in the welding process, welding methods can be divided into three categories.
(1) Fusion welding. The welding part of the workpiece is locally heated to a molten state to form a molten pool (usually with filler metal), which is cooled and crystallized to form a weld, which is combined into an inseparable whole by the welding workpiece. Common fusion welding methods include gas welding, arc welding, electroslag welding, plasma arc welding, electron beam welding, laser welding, etc.
(2) Pressure welding. InWeldingIn the process, whether heated or not, the welding method of pressure is required. Common pressure welding are resistance welding, friction welding, cold pressure welding, diffusion welding, explosive welding, etc.
(3) Brazing. After the brazing filler metal (filler metal) with a melting point lower than that of the metal to be welded is melted, the joint gap is filled, and the metal to be welded is interdiffused to realize the connection. The welding workpiece does not melt during the brazing process and generally has no plastic deformation.
WeldingFeatures of production:
(1) Save metal materials and light structure.
(2) To make heavy and complex machine parts, simplify casting, forging and cutting processes, and obtain the best technical and economic results.
(3) The welded joint has good mechanical properties and sealing performance.
(4) It is possible to manufacture a bimetal structure so that the performance of the material can be fully utilized.
Application: Welding technology is widely used in machine manufacturing, shipbuilding industry, construction engineering, power equipment production, aviation and aerospace industry.
Deficiencies: welding technology also has some shortcomings, such as welding structure can not be disassembled, to the maintenance of inconvenience; welding structure will exist in the welding stress and deformation; welding joints of the organization and properties are often uneven, and will produce welding defects.
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